An approach for improving spinning reserve capacity by means of optimal utilization of DR program

In a deregulated power system, to ensure the electricity to be delivered reliably and the system to be operated securely, various ancillary services are needed. Spinning reserve is one of these ancillary services that a reasonable amount of it is essential to satisfy system security constraints when the power system faces with a contingency. Direct load control (DLC) is one of the incentive-based DR programs which is usually used for peak clipping or load shifting from peak load period to light load period in order to improve the system efficiency. In this paper, DLC program has been considered as one of the spinning reserve resources from both economical and reliability criteria viewpoints.